As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AN ELECTRICAL MALFUNCTION OCCURRED CAUSED BY THE NR 1 AC GEN ISOLATED THE (3) BUS TIES AND DISCONNECTED THE NR 1 CSD. ALSO, NOTED ALL (8) BOOST PUMP CB'S HAD OPENED. MAINT DEFERRED THE NR 1 GEN AND CSD. LATER REPLACED NR 1 AC GEN AND CSD, OPS CHECKED GOOD.